A hard disk contains four Platters. Each side of the platter is coated with a magnetic oxide, allowing data to be stored on it. The platters are 3.5 inches in diameter. If the hard disk has a capacity of 800 GB and 80% of the platter surface is used for data storage, what is the bit density per square inch?© BrainMass Inc. brainmass.com September 25, 2018, 11:16 am ad1c9bdddf - https://brainmass.com/engineering/electrical-engineering/memory-storage-and-bit-density-531896
Since the hard disk contains four platters and each side of the platter is used for storing data on it, we have in total (4*2), that is, 8 platter side surfaces to store the data.
As the platters are 3.5 inches in diameter, surface area of one side of the platter = (22/7)*(3.5*3.5)/4 [Using ...
Step by step computations shown along with explanation.